'Later he bought a few rounds of shots for a group of girls.
She looked pretty embarrassed and upset.' Noel, 33, and Steve, 42 - who also has a girlfriend China Chow, daughter of restaurateur Michael Chow - were pictured diving into a cab with two girls at about 3.45am, en route for the Met Bar in Mayfair.
But they only stayed for five minutes before moving on to the Intercontinental hotel in Park Lane.
My night owl reports: "Pixie was knocking back pints like a pro and boasting about her drunken antics the night before.
"She was desperate for Noel to turn up and, when he finally did, she couldn't take her eyes off him.
"He has a bit of a reputation but that's all part of the appeal. They were cuddled up in a corner kissing for most of the night." Scroll down for more...
Friends say Pixie has been obsessed with Fielding, who is a close friend of controversial TV presenter Russell Brand, for weeks."She first started talking to him after they met at a party at Maddox nightclub in London last week following Noel and Russell's gig for the Teenage Cancer Trust at the Royal Albert Hall," says a source."Since then she has been completely infatuated." The news is also likely to come as a shock for Peaches, who claimed she was dating Fielding a year ago - which itself surprised Noel, who was in a long-term relationship with comedienne Dee Plume.Noel attempted to keep hidden as they left in a cab An onlooker said: 'A guy tried to start a fight with a few of Noel's mates, so he hit him.Some glasses were smashed, and Noel gave him verbal dressing down.' While Steve and Noel may seem unlikely partners, one talking point is that they've both been linked with Kurt Cobain's ex Courtney Love.Just days after the 16-year-old was pictured looking the worse for wear after a night out with Rod Stewart's daughter Kimberley and other girlfriends, it now turns out she is seeing a man more than twice her age.